mirrored from git://git.osmocom.org/rtl-sdr
-
-
Notifications
You must be signed in to change notification settings - Fork 313
/
Copy pathtuner_r82xx.c
1366 lines (1153 loc) · 33.9 KB
/
tuner_r82xx.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Rafael Micro R820T/R828D driver
*
* Copyright (C) 2013 Mauro Carvalho Chehab <[email protected]>
* Copyright (C) 2013 Steve Markgraf <[email protected]>
*
* This driver is a heavily modified version of the driver found in the
* Linux kernel:
* http://git.linuxtv.org/linux-2.6.git/history/HEAD:/drivers/media/tuners/r820t.c
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdbool.h>
#include "rtlsdr_i2c.h"
#include "tuner_r82xx.h"
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#define MHZ(x) ((x)*1000*1000)
#define KHZ(x) ((x)*1000)
#define HF 1
#define VHF 2
#define UHF 3
/*
* Static constants
*/
/* Those initial values start from REG_SHADOW_START */
static const uint8_t r82xx_init_array[NUM_REGS] = {
0x83, 0x32, 0x75, /* 05 to 07 */
0xc0, 0x40, 0xd6, 0x6c, /* 08 to 0b */
0xf5, 0x63, 0x75, 0x68, /* 0c to 0f */
0x6c, 0x83, 0x80, 0x00, /* 10 to 13 */
0x0f, 0x00, 0xc0, 0x30, /* 14 to 17 */
0x48, 0xcc, 0x60, 0x00, /* 18 to 1b */
0x54, 0xae, 0x4a, 0xc0 /* 1c to 1f */
};
/* Tuner frequency ranges */
static const struct r82xx_freq_range freq_ranges[] = {
{
/* .freq = */ 0, /* Start freq, in MHz */
/* .open_d = */ 0x08, /* low */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0xdf, /* R27[7:0] band2,band0 */
/* .xtal_cap20p = */ 0x02, /* R16[1:0] 20pF (10) */
/* .xtal_cap10p = */ 0x01,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 50, /* Start freq, in MHz */
/* .open_d = */ 0x08, /* low */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0xbe, /* R27[7:0] band4,band1 */
/* .xtal_cap20p = */ 0x02, /* R16[1:0] 20pF (10) */
/* .xtal_cap10p = */ 0x01,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 55, /* Start freq, in MHz */
/* .open_d = */ 0x08, /* low */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x8b, /* R27[7:0] band7,band4 */
/* .xtal_cap20p = */ 0x02, /* R16[1:0] 20pF (10) */
/* .xtal_cap10p = */ 0x01,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 60, /* Start freq, in MHz */
/* .open_d = */ 0x08, /* low */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x7b, /* R27[7:0] band8,band4 */
/* .xtal_cap20p = */ 0x02, /* R16[1:0] 20pF (10) */
/* .xtal_cap10p = */ 0x01,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 65, /* Start freq, in MHz */
/* .open_d = */ 0x08, /* low */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x69, /* R27[7:0] band9,band6 */
/* .xtal_cap20p = */ 0x02, /* R16[1:0] 20pF (10) */
/* .xtal_cap10p = */ 0x01,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 70, /* Start freq, in MHz */
/* .open_d = */ 0x08, /* low */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x58, /* R27[7:0] band10,band7 */
/* .xtal_cap20p = */ 0x02, /* R16[1:0] 20pF (10) */
/* .xtal_cap10p = */ 0x01,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 75, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x44, /* R27[7:0] band11,band11 */
/* .xtal_cap20p = */ 0x02, /* R16[1:0] 20pF (10) */
/* .xtal_cap10p = */ 0x01,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 80, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x44, /* R27[7:0] band11,band11 */
/* .xtal_cap20p = */ 0x02, /* R16[1:0] 20pF (10) */
/* .xtal_cap10p = */ 0x01,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 90, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x34, /* R27[7:0] band12,band11 */
/* .xtal_cap20p = */ 0x01, /* R16[1:0] 10pF (01) */
/* .xtal_cap10p = */ 0x01,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 100, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x34, /* R27[7:0] band12,band11 */
/* .xtal_cap20p = */ 0x01, /* R16[1:0] 10pF (01) */
/* .xtal_cap10p = */ 0x01,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 110, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x24, /* R27[7:0] band13,band11 */
/* .xtal_cap20p = */ 0x01, /* R16[1:0] 10pF (01) */
/* .xtal_cap10p = */ 0x01,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 120, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x24, /* R27[7:0] band13,band11 */
/* .xtal_cap20p = */ 0x01, /* R16[1:0] 10pF (01) */
/* .xtal_cap10p = */ 0x01,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 140, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x14, /* R27[7:0] band14,band11 */
/* .xtal_cap20p = */ 0x01, /* R16[1:0] 10pF (01) */
/* .xtal_cap10p = */ 0x01,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 180, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x13, /* R27[7:0] band14,band12 */
/* .xtal_cap20p = */ 0x00, /* R16[1:0] 0pF (00) */
/* .xtal_cap10p = */ 0x00,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 220, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x13, /* R27[7:0] band14,band12 */
/* .xtal_cap20p = */ 0x00, /* R16[1:0] 0pF (00) */
/* .xtal_cap10p = */ 0x00,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 250, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x11, /* R27[7:0] highest,highest */
/* .xtal_cap20p = */ 0x00, /* R16[1:0] 0pF (00) */
/* .xtal_cap10p = */ 0x00,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 280, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */
/* .tf_c = */ 0x00, /* R27[7:0] highest,highest */
/* .xtal_cap20p = */ 0x00, /* R16[1:0] 0pF (00) */
/* .xtal_cap10p = */ 0x00,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 310, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */
/* .tf_c = */ 0x00, /* R27[7:0] highest,highest */
/* .xtal_cap20p = */ 0x00, /* R16[1:0] 0pF (00) */
/* .xtal_cap10p = */ 0x00,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 450, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */
/* .tf_c = */ 0x00, /* R27[7:0] highest,highest */
/* .xtal_cap20p = */ 0x00, /* R16[1:0] 0pF (00) */
/* .xtal_cap10p = */ 0x00,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 588, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */
/* .tf_c = */ 0x00, /* R27[7:0] highest,highest */
/* .xtal_cap20p = */ 0x00, /* R16[1:0] 0pF (00) */
/* .xtal_cap10p = */ 0x00,
/* .xtal_cap0p = */ 0x00,
}, {
/* .freq = */ 650, /* Start freq, in MHz */
/* .open_d = */ 0x00, /* high */
/* .rf_mux_ploy = */ 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */
/* .tf_c = */ 0x00, /* R27[7:0] highest,highest */
/* .xtal_cap20p = */ 0x00, /* R16[1:0] 0pF (00) */
/* .xtal_cap10p = */ 0x00,
/* .xtal_cap0p = */ 0x00,
}
};
static int r82xx_xtal_capacitor[][2] = {
{ 0x0b, XTAL_LOW_CAP_30P },
{ 0x02, XTAL_LOW_CAP_20P },
{ 0x01, XTAL_LOW_CAP_10P },
{ 0x00, XTAL_LOW_CAP_0P },
{ 0x10, XTAL_HIGH_CAP_0P },
};
/*
* I2C read/write code and shadow registers logic
*/
static void shadow_store(struct r82xx_priv *priv, uint8_t reg, const uint8_t *val,
int len)
{
int r = reg - REG_SHADOW_START;
if (r < 0) {
len += r;
val -= r;
r = 0;
}
if (len <= 0)
return;
if (len > NUM_REGS - r)
len = NUM_REGS - r;
memcpy(&priv->regs[r], val, len);
}
static bool shadow_equal(struct r82xx_priv *priv, uint8_t reg, const uint8_t *val,
int len)
{
int r = reg - REG_SHADOW_START;
if (r < 0 || len < 0 || len > NUM_REGS - r)
return false;
if (memcmp(&priv->regs[r], val, len) == 0)
return true;
return false;
}
static int r82xx_write(struct r82xx_priv *priv, uint8_t reg, const uint8_t *val,
unsigned int len)
{
int rc, size, pos = 0;
/* Avoid setting registers unnecessarily since it's slow */
if (shadow_equal(priv, reg, val, len))
return 0;
/* Store the shadow registers */
shadow_store(priv, reg, val, len);
do {
if (len > priv->cfg->max_i2c_msg_len - 1)
size = priv->cfg->max_i2c_msg_len - 1;
else
size = len;
/* Fill I2C buffer */
priv->buf[0] = reg;
memcpy(&priv->buf[1], &val[pos], size);
rc = rtlsdr_i2c_write_fn(priv->rtl_dev, priv->cfg->i2c_addr,
priv->buf, size + 1);
if (rc != size + 1) {
fprintf(stderr, "%s: i2c wr failed=%d reg=%02x len=%d\n",
__FUNCTION__, rc, reg, size);
if (rc < 0)
return rc;
return -1;
}
reg += size;
len -= size;
pos += size;
} while (len > 0);
return 0;
}
static int r82xx_write_reg(struct r82xx_priv *priv, uint8_t reg, uint8_t val)
{
return r82xx_write(priv, reg, &val, 1);
}
static int r82xx_read_cache_reg(struct r82xx_priv *priv, int reg)
{
reg -= REG_SHADOW_START;
if (reg >= 0 && reg < NUM_REGS)
return priv->regs[reg];
else
return -1;
}
static int r82xx_write_reg_mask(struct r82xx_priv *priv, uint8_t reg, uint8_t val,
uint8_t bit_mask)
{
int rc = r82xx_read_cache_reg(priv, reg);
if (rc < 0)
return rc;
val = (rc & ~bit_mask) | (val & bit_mask);
return r82xx_write(priv, reg, &val, 1);
}
static uint8_t r82xx_bitrev(uint8_t byte)
{
const uint8_t lut[16] = { 0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe,
0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf };
return (lut[byte & 0xf] << 4) | lut[byte >> 4];
}
static int r82xx_read(struct r82xx_priv *priv, uint8_t reg, uint8_t *val, int len)
{
int rc, i;
uint8_t *p = &priv->buf[1];
priv->buf[0] = reg;
rc = rtlsdr_i2c_write_fn(priv->rtl_dev, priv->cfg->i2c_addr, priv->buf, 1);
if (rc != 1) {
fprintf(stderr, "%s: i2c wr failed=%d reg=%02x len=%d\n",
__FUNCTION__, rc, reg, 1);
if (rc < 0)
return rc;
return -1;
}
rc = rtlsdr_i2c_read_fn(priv->rtl_dev, priv->cfg->i2c_addr, p, len);
if (rc != len) {
fprintf(stderr, "%s: i2c rd failed=%d reg=%02x len=%d\n",
__FUNCTION__, rc, reg, len);
if (rc < 0)
return rc;
return -1;
}
/* Copy data to the output buffer */
for (i = 0; i < len; i++)
val[i] = r82xx_bitrev(p[i]);
return 0;
}
/*
* r82xx tuning logic
*/
static int r82xx_set_mux(struct r82xx_priv *priv, uint32_t freq)
{
const struct r82xx_freq_range *range;
int rc;
unsigned int i;
uint8_t val;
/* Get the proper frequency range */
freq = freq / 1000000;
for (i = 0; i < ARRAY_SIZE(freq_ranges) - 1; i++) {
if (freq < freq_ranges[i + 1].freq)
break;
}
range = &freq_ranges[i];
/* Open Drain */
rc = r82xx_write_reg_mask(priv, 0x17, range->open_d, 0x08);
if (rc < 0)
return rc;
/* RF_MUX,Polymux */
rc = r82xx_write_reg_mask(priv, 0x1a, range->rf_mux_ploy, 0xc3);
if (rc < 0)
return rc;
/* TF BAND */
rc = r82xx_write_reg(priv, 0x1b, range->tf_c);
if (rc < 0)
return rc;
/* XTAL CAP & Drive */
switch (priv->xtal_cap_sel) {
case XTAL_LOW_CAP_30P:
case XTAL_LOW_CAP_20P:
val = range->xtal_cap20p | 0x08;
break;
case XTAL_LOW_CAP_10P:
val = range->xtal_cap10p | 0x08;
break;
case XTAL_HIGH_CAP_0P:
val = range->xtal_cap0p | 0x00;
break;
default:
case XTAL_LOW_CAP_0P:
val = range->xtal_cap0p | 0x08;
break;
}
rc = r82xx_write_reg_mask(priv, 0x10, val, 0x0b);
if (rc < 0)
return rc;
rc = r82xx_write_reg_mask(priv, 0x08, 0x00, 0x3f);
if (rc < 0)
return rc;
rc = r82xx_write_reg_mask(priv, 0x09, 0x00, 0x3f);
return rc;
}
static inline uint8_t mask_reg8(uint8_t reg, uint8_t val, uint8_t mask)
{
return (reg & ~mask) | (val & mask);
}
static int r82xx_set_pll(struct r82xx_priv *priv, uint32_t freq)
{
int rc, i;
unsigned sleep_time = 10000;
uint64_t vco_freq;
uint64_t vco_div;
uint32_t vco_min = 1770000; /* kHz */
uint32_t vco_max = vco_min * 2; /* kHz */
uint32_t freq_khz, pll_ref;
uint32_t sdm = 0;
uint8_t mix_div = 2;
uint8_t div_buf = 0;
uint8_t div_num = 0;
uint8_t vco_power_ref = 2;
uint8_t refdiv2 = 0;
uint8_t ni, si, nint, vco_fine_tune, val;
uint8_t data[5];
uint8_t regs[7];
/* Frequency in kHz */
freq_khz = (freq + 500) / 1000;
pll_ref = priv->cfg->xtal;
/* set pll autotune = 128kHz */
rc = r82xx_write_reg_mask(priv, 0x1a, 0x00, 0x0c);
if (rc < 0)
return rc;
/* regs 0x10 to 0x16 */
memcpy(regs, &priv->regs[0x10 - REG_SHADOW_START], 7);
regs[0] = mask_reg8(regs[0], refdiv2, 0x10);
/* set VCO current = 100 */
regs[2] = mask_reg8(regs[2], 0x80, 0xe0);
/* Calculate divider */
while (mix_div <= 64) {
if (((freq_khz * mix_div) >= vco_min) &&
((freq_khz * mix_div) < vco_max)) {
div_buf = mix_div;
while (div_buf > 2) {
div_buf = div_buf >> 1;
div_num++;
}
break;
}
mix_div = mix_div << 1;
}
rc = r82xx_read(priv, 0x00, data, sizeof(data));
if (rc < 0)
return rc;
if (priv->cfg->rafael_chip == CHIP_R828D)
vco_power_ref = 1;
vco_fine_tune = (data[4] & 0x30) >> 4;
if (vco_fine_tune > vco_power_ref)
div_num = div_num - 1;
else if (vco_fine_tune < vco_power_ref)
div_num = div_num + 1;
regs[0] = mask_reg8(regs[0], div_num << 5, 0xe0);
vco_freq = (uint64_t)freq * (uint64_t)mix_div;
/* We want to approximate:
* vco_freq / (2 * pll_ref)
*
* in the form:
* nint + sdm/65536
*
* where nint,sdm are integers and 0 < nint, 0 <= sdm < 65536
*
* Scaling to fixed point and rounding:
*
* vco_div = 65536*(nint + sdm/65536) = int( 0.5 + 65536 * vco_freq / (2 * pll_ref) )
* vco_div = 65536*nint + sdm = int( (pll_ref + 65536 * vco_freq) / (2 * pll_ref) )
*/
vco_div = (pll_ref + 65536 * vco_freq) / (2 * pll_ref);
nint = (uint32_t) (vco_div / 65536);
sdm = (uint32_t) (vco_div % 65536);
if (nint > ((128 / vco_power_ref) - 1)) {
fprintf(stderr, "[R82XX] No valid PLL values for %u Hz!\n", freq);
return -1;
}
ni = (nint - 13) / 4;
si = nint - 4 * ni - 13;
regs[4] = ni + (si << 6);
/* pw_sdm */
if (sdm == 0)
val = 0x08;
else
val = 0x00;
regs[2] = mask_reg8(regs[2], val, 0x08);
regs[5] = sdm & 0xff;
regs[6] = sdm >> 8;
rc = r82xx_write(priv, 0x10, regs, 7);
if (rc < 0)
return rc;
for (i = 0; i < 2; i++) {
// usleep_range(sleep_time, sleep_time + 1000);
/* Check if PLL has locked */
rc = r82xx_read(priv, 0x00, data, 3);
if (rc < 0)
return rc;
if (data[2] & 0x40)
break;
if (!i) {
/* Didn't lock. Increase VCO current */
rc = r82xx_write_reg_mask(priv, 0x12, 0x60, 0xe0);
if (rc < 0)
return rc;
}
}
if (!(data[2] & 0x40)) {
fprintf(stderr, "[R82XX] PLL not locked!\n");
priv->has_lock = 0;
return 0;
}
priv->has_lock = 1;
/* set pll autotune = 8kHz */
rc = r82xx_write_reg_mask(priv, 0x1a, 0x08, 0x08);
return rc;
}
static int r82xx_sysfreq_sel(struct r82xx_priv *priv, uint32_t freq,
enum r82xx_tuner_type type,
uint32_t delsys)
{
int rc;
uint8_t mixer_top, lna_top, cp_cur, div_buf_cur, lna_vth_l, mixer_vth_l;
uint8_t air_cable1_in, cable2_in, pre_dect, lna_discharge, filter_cur;
switch (delsys) {
case SYS_DVBT:
if ((freq == 506000000) || (freq == 666000000) ||
(freq == 818000000)) {
mixer_top = 0x14; /* mixer top:14 , top-1, low-discharge */
lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
cp_cur = 0x28; /* 101, 0.2 */
div_buf_cur = 0x20; /* 10, 200u */
} else {
mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
cp_cur = 0x38; /* 111, auto */
div_buf_cur = 0x30; /* 11, 150u */
}
lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
air_cable1_in = 0x00;
cable2_in = 0x00;
pre_dect = 0x40;
lna_discharge = 14;
filter_cur = 0x40; /* 10, low */
break;
case SYS_DVBT2:
mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
air_cable1_in = 0x00;
cable2_in = 0x00;
pre_dect = 0x40;
lna_discharge = 14;
cp_cur = 0x38; /* 111, auto */
div_buf_cur = 0x30; /* 11, 150u */
filter_cur = 0x40; /* 10, low */
break;
case SYS_ISDBT:
mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
lna_vth_l = 0x75; /* lna vth 1.04 , vtl 0.84 */
mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
air_cable1_in = 0x00;
cable2_in = 0x00;
pre_dect = 0x40;
lna_discharge = 14;
cp_cur = 0x38; /* 111, auto */
div_buf_cur = 0x30; /* 11, 150u */
filter_cur = 0x40; /* 10, low */
break;
default: /* DVB-T 8M */
mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */
lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */
lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */
mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */
air_cable1_in = 0x00;
cable2_in = 0x00;
pre_dect = 0x40;
lna_discharge = 14;
cp_cur = 0x38; /* 111, auto */
div_buf_cur = 0x30; /* 11, 150u */
filter_cur = 0x40; /* 10, low */
break;
}
if (priv->cfg->use_predetect) {
rc = r82xx_write_reg_mask(priv, 0x06, pre_dect, 0x40);
if (rc < 0)
return rc;
}
rc = r82xx_write_reg_mask(priv, 0x1d, lna_top, 0xc7);
if (rc < 0)
return rc;
rc = r82xx_write_reg_mask(priv, 0x1c, mixer_top, 0xf8);
if (rc < 0)
return rc;
rc = r82xx_write_reg(priv, 0x0d, lna_vth_l);
if (rc < 0)
return rc;
rc = r82xx_write_reg(priv, 0x0e, mixer_vth_l);
if (rc < 0)
return rc;
priv->input = air_cable1_in;
/* Air-IN only for Astrometa */
rc = r82xx_write_reg_mask(priv, 0x05, air_cable1_in, 0x60);
if (rc < 0)
return rc;
rc = r82xx_write_reg_mask(priv, 0x06, cable2_in, 0x08);
if (rc < 0)
return rc;
rc = r82xx_write_reg_mask(priv, 0x11, cp_cur, 0x38);
if (rc < 0)
return rc;
rc = r82xx_write_reg_mask(priv, 0x17, div_buf_cur, 0x30);
if (rc < 0)
return rc;
rc = r82xx_write_reg_mask(priv, 0x0a, filter_cur, 0x60);
if (rc < 0)
return rc;
/*
* Set LNA
*/
if (type != TUNER_ANALOG_TV) {
/* LNA TOP: lowest */
rc = r82xx_write_reg_mask(priv, 0x1d, 0, 0x38);
if (rc < 0)
return rc;
/* 0: normal mode */
rc = r82xx_write_reg_mask(priv, 0x1c, 0, 0x04);
if (rc < 0)
return rc;
/* 0: PRE_DECT off */
rc = r82xx_write_reg_mask(priv, 0x06, 0, 0x40);
if (rc < 0)
return rc;
/* agc clk 250hz */
rc = r82xx_write_reg_mask(priv, 0x1a, 0x30, 0x30);
if (rc < 0)
return rc;
// msleep(250);
/* write LNA TOP = 3 */
rc = r82xx_write_reg_mask(priv, 0x1d, 0x18, 0x38);
if (rc < 0)
return rc;
/*
* write discharge mode
* FIXME: IMHO, the mask here is wrong, but it matches
* what's there at the original driver
*/
rc = r82xx_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
if (rc < 0)
return rc;
/* LNA discharge current */
rc = r82xx_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
if (rc < 0)
return rc;
/* agc clk 60hz */
rc = r82xx_write_reg_mask(priv, 0x1a, 0x20, 0x30);
if (rc < 0)
return rc;
} else {
/* PRE_DECT off */
rc = r82xx_write_reg_mask(priv, 0x06, 0, 0x40);
if (rc < 0)
return rc;
/* write LNA TOP */
rc = r82xx_write_reg_mask(priv, 0x1d, lna_top, 0x38);
if (rc < 0)
return rc;
/*
* write discharge mode
* FIXME: IMHO, the mask here is wrong, but it matches
* what's there at the original driver
*/
rc = r82xx_write_reg_mask(priv, 0x1c, mixer_top, 0x04);
if (rc < 0)
return rc;
/* LNA discharge current */
rc = r82xx_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f);
if (rc < 0)
return rc;
/* agc clk 1Khz, external det1 cap 1u */
rc = r82xx_write_reg_mask(priv, 0x1a, 0x00, 0x30);
if (rc < 0)
return rc;
rc = r82xx_write_reg_mask(priv, 0x10, 0x00, 0x04);
if (rc < 0)
return rc;
}
return 0;
}
static int r82xx_set_tv_standard(struct r82xx_priv *priv,
unsigned bw,
enum r82xx_tuner_type type,
uint32_t delsys)
{
int rc, i;
uint32_t if_khz, filt_cal_lo;
uint8_t data[5];
uint8_t filt_gain, img_r, filt_q, hp_cor, ext_enable, loop_through;
uint8_t lt_att, flt_ext_widest, polyfil_cur;
int need_calibration;
/* BW < 6 MHz */
if_khz = 3570;
filt_cal_lo = 56000; /* 52000->56000 */
filt_gain = 0x10; /* +3db, 6mhz on */
img_r = 0x00; /* image negative */
filt_q = 0x10; /* r10[4]:low q(1'b1) */
hp_cor = 0x6b; /* 1.7m disable, +2cap, 1.0mhz */
ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */
loop_through = 0x01; /* r5[7], lt off */
lt_att = 0x00; /* r31[7], lt att enable */
flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */
polyfil_cur = 0x60; /* r25[6:5]:min */
/* Initialize the shadow registers */
memcpy(priv->regs, r82xx_init_array, sizeof(r82xx_init_array));
/* Init Flag & Xtal_check Result (inits VGA gain, needed?)*/
rc = r82xx_write_reg_mask(priv, 0x0c, 0x00, 0x0f);
if (rc < 0)
return rc;
/* version */
rc = r82xx_write_reg_mask(priv, 0x13, VER_NUM, 0x3f);
if (rc < 0)
return rc;
/* for LT Gain test */
if (type != TUNER_ANALOG_TV) {
rc = r82xx_write_reg_mask(priv, 0x1d, 0x00, 0x38);
if (rc < 0)
return rc;
// usleep_range(1000, 2000);
}
priv->int_freq = if_khz * 1000;
/* Check if standard changed. If so, filter calibration is needed */
/* as we call this function only once in rtlsdr, force calibration */
need_calibration = 1;
if (need_calibration) {
for (i = 0; i < 2; i++) {
/* Set filt_cap */
rc = r82xx_write_reg_mask(priv, 0x0b, hp_cor, 0x60);
if (rc < 0)
return rc;
/* set cali clk =on */
rc = r82xx_write_reg_mask(priv, 0x0f, 0x04, 0x04);
if (rc < 0)
return rc;
/* X'tal cap 0pF for PLL */
rc = r82xx_write_reg_mask(priv, 0x10, 0x00, 0x03);
if (rc < 0)
return rc;
rc = r82xx_set_pll(priv, filt_cal_lo * 1000);
if (rc < 0 || !priv->has_lock)
return rc;
/* Start Trigger */
rc = r82xx_write_reg_mask(priv, 0x0b, 0x10, 0x10);
if (rc < 0)
return rc;
// usleep_range(1000, 2000);
/* Stop Trigger */
rc = r82xx_write_reg_mask(priv, 0x0b, 0x00, 0x10);
if (rc < 0)
return rc;
/* set cali clk =off */
rc = r82xx_write_reg_mask(priv, 0x0f, 0x00, 0x04);
if (rc < 0)
return rc;
/* Check if calibration worked */
rc = r82xx_read(priv, 0x00, data, sizeof(data));
if (rc < 0)
return rc;
priv->fil_cal_code = data[4] & 0x0f;
if (priv->fil_cal_code && priv->fil_cal_code != 0x0f)
break;
}
/* narrowest */
if (priv->fil_cal_code == 0x0f)
priv->fil_cal_code = 0;
}
rc = r82xx_write_reg_mask(priv, 0x0a,
filt_q | priv->fil_cal_code, 0x1f);
if (rc < 0)
return rc;
/* Set BW, Filter_gain, & HP corner */
rc = r82xx_write_reg_mask(priv, 0x0b, hp_cor, 0xef);
if (rc < 0)
return rc;
/* Set Img_R */
rc = r82xx_write_reg_mask(priv, 0x07, img_r, 0x80);
if (rc < 0)
return rc;
/* Set filt_3dB, V6MHz */
rc = r82xx_write_reg_mask(priv, 0x06, filt_gain, 0x30);
if (rc < 0)
return rc;
/* channel filter extension */
rc = r82xx_write_reg_mask(priv, 0x1e, ext_enable, 0x60);
if (rc < 0)
return rc;
/* Loop through */
rc = r82xx_write_reg_mask(priv, 0x05, loop_through, 0x80);
if (rc < 0)
return rc;
/* Loop through attenuation */
rc = r82xx_write_reg_mask(priv, 0x1f, lt_att, 0x80);
if (rc < 0)
return rc;
/* filter extension widest */
rc = r82xx_write_reg_mask(priv, 0x0f, flt_ext_widest, 0x80);
if (rc < 0)
return rc;
/* RF poly filter current */
rc = r82xx_write_reg_mask(priv, 0x19, polyfil_cur, 0x60);
if (rc < 0)
return rc;
/* Store current standard. If it changes, re-calibrate the tuner */
priv->delsys = delsys;
priv->type = type;
priv->bw = bw;
return 0;
}
static int r82xx_read_gain(struct r82xx_priv *priv)
{
uint8_t data[4];
int rc;
rc = r82xx_read(priv, 0x00, data, sizeof(data));
if (rc < 0)
return rc;
return ((data[3] & 0x0f) << 1) + ((data[3] & 0xf0) >> 4);
}
/* measured with a Racal 6103E GSM test set at 928 MHz with -60 dBm
* input power, for raw results see:
* http://steve-m.de/projects/rtl-sdr/gain_measurement/r820t/
*/
#define VGA_BASE_GAIN -47
static const int r82xx_vga_gain_steps[] = {
0, 26, 26, 30, 42, 35, 24, 13, 14, 32, 36, 34, 35, 37, 35, 36
};
static const int r82xx_lna_gain_steps[] = {
0, 9, 13, 40, 38, 13, 31, 22, 26, 31, 26, 14, 19, 5, 35, 13
};
static const int r82xx_mixer_gain_steps[] = {
0, 5, 10, 10, 19, 9, 10, 25, 17, 10, 8, 16, 13, 6, 3, -8
};
int r82xx_set_gain(struct r82xx_priv *priv, int set_manual_gain, int gain)
{
int rc;
if (set_manual_gain) {
int i, total_gain = 0;
uint8_t mix_index = 0, lna_index = 0;
uint8_t data[4];
/* LNA auto off */
rc = r82xx_write_reg_mask(priv, 0x05, 0x10, 0x10);
if (rc < 0)
return rc;
/* Mixer auto off */
rc = r82xx_write_reg_mask(priv, 0x07, 0, 0x10);
if (rc < 0)
return rc;
rc = r82xx_read(priv, 0x00, data, sizeof(data));
if (rc < 0)
return rc;